Solvent soluble fluorine-containing polymer, coating composition containing the same and coating process thereof

A fluorine-containing coating composition comprising

• [A] a fluorine-containing polymer which is
• (i) a copolymer consisting substantially of
• (a) a fluoroolefin having 2 or 3 carbon atoms,
• (b) vinyl ether, and
• (c) an organosilicon compound in which the organo portion of the molecule is a hydrocarbon containing unsaturated double bonds and which compound contains a hydrolyzable group,
• (ii) said copolymer comprising, based on the total mole number of said (a)-(c) in the copolymer, 30-70 mol% of (a), 20-60 mol% of (b) and 1-25 mol% of (c) and
• (iii) having a number average molecular weight (Mn) of 3000-20000 as measured by gel permeation chromatography,
• [B] a metal chelate compound, and
• [C] an organic solvent.

A fluorine-containing coating composition, characterized in that said composition comprises:

• [A] a fluorine-containing polymer which is
• (i) a copolymer consisting substantially of
• (a) a fluoroolefin having 2 or 3 carbon atoms,
• (b) vinyl ether, and
• (c) an organosilicon compound in which the organo portion of the molecule is a hydrocarbon containing unsaturated double bonds and which compound contains a hydrolyzable group,
• (ii) said copolymer comprising, based on the total mole number of said (a)-(c) in the copolymer, 30-70 mol% of (a), 20-60 mol% of (b) and 1-25 mol% of (c), and
• (iii) said copolymer having a number average molecular weight (Mn) of 3000-200000 as measured by gel permeation chromatography,
• (B) an organosilicate, and
• (C) an organic solvent.

A fluorine-containing coating composition comprising

• [A] a fluorine-containing polymer which is
• (i) a copolymer consisting substantially of
• (a) a fluoroolefin having 2 or 3 carbon atoms,
• (b) vinyl ether, and
• (c) an organosilicon compound in which the organo portion of the molecule is a hydrocarbon containing unsaturated double bonds and which compound contains a hydrolyzable group,
• (ii) said copolymer comprising, based on the total mole number of said (a)-(c) in the copolymer, 30-70 mol% of (a), 20-60 mol% of (b) and 1-25 mol% of (c) and
• (iii) having a number average molecular weight (Mn) of 3000-200000 as measured by gel permeation chromatography,
• [B] a condensation reaction product of a silane compound represented by the formula R.sup.4.sub.n2 Si(OR.sup.5).sub.4-n.sbsb.2 wherein R.sup.4 is alkyl, cycloalkyl, aryl or aralkyl, R.sup.5 is alkyl, cycloalkyl, aryl, aralkyl or allyl, and n is zero or 1, provided that OR.sup.5 of 4-n.sub.2 may be the same or different, or partial hydrolyzates thereof with an epoxy-containing alcohol, and
• [C] an organic solvent.